Gas purification



y 5, 1932- R. HEINRICH 1,865,907

GAS PURIFICATION Filed Feb. 5, 19:51

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I I Ii WITNESSES: INVENTOR Is. flaw" @mwban/ I I mam/4 Hw /ch ATT'o NEYPatented July 5, 1932 UNITED STATES PATENT OFFICE? RICHARD HEINRICH, OIBERLIN-SUDENDE, GERMANY, ASBIGNORTO WESTINGHOUSE ELECTRIC &MANUFACTURING COMPANY, A CORPORATION 01' PENNSYLVANIA GAB PURIFICATIONApplication filed l'ebruary a, 1881, lerlal lo.

- same weight of larger particles.

By the use of my invention it is possible to take advantage of thelesser deposition energy of the larger particles by coagulating orcollecting the finer particles into comparatively large easily chargedparticles. I accomplish this result by sub'ecting the gas being treatedto alternate hig -'tens1on direct current impulses and high-frequencydamped alternating current impulses. The alternating current impulsescoagulate the fine dust into conglomerate masses which are charged bythe high-tension direct current impulse and driven from suspension tothe collecting electrodes.

Other objects and advantages of m invention will be apparent from the tolowing detailed description taken in conjunction with the accompanyingdrawing, in which: Q

Figure 1 is a schematic diagram of an apparatus according to myinvention, and

Fig. 2 is a time current diagram showing the manner in which thealternate impulses are applied according to my invention.

The apparatus disclosed in the drawing comprises atreating chamber 1having a collecting electrode 2 therein and a charging or ionizingelectrode 3 electrically insulated and se arated from the collectingelectrode.

he treater, chamber '1 is provided with suitable assages 5 for theadmission or discharge of the as to be treated, which is conductedthroug the treater chamber in any desired manner, such as by a blower orfan by natural draft or other means.

A high tension transformer 8 supplied from an alternatin current line 9provides a source of high-tension electrical current. In the preferredembodiment of my invention,

518,150, and in Germanyl'ebrnary 10, 1880.

one side of the high-tension secondary is groundedand the other side islead to'the terminal 10 ofa synchronous commutator 12. The lead 14 isprovided from the commutator to the charging electrode 3 of theprecipitator. The commutator 12 is synchronized with the high-tensionoutput of the transformer 8 so that during alternate half cycles thetransformer is connected through the commutator to the electrode 3 toprovide a direct or unidirectional current impulse to the electrode.During the other half cycle the transformer 8 is disconnected from theelectrode and during this half cycle the commutator 12 connectselectrode 3 to a terminal 16 of a hi h-frequency generator such asaTesla trans ormer 20, which is, in turn, fed by an alternati currentline 22 which may be, if desire identical with the line 9. I

In the operation of my device, the commu& tator 12' alternately.connects electrode 3 to the transformers 8 and 20 so that the gases inthe treater are alternately subjected to high-tension unidirectionalcurrents and to damped high-trequency alternating currents. This isgraphically illustrated in Fig. 2,- which shows the time currentrelation in my device, the high-tension unidirectional surge beingillustrated by the loops 30 of the curve and the high-frequency surge bythe loops'35. The damped high-frequency surge coagulates orconglomerates the small particles of the impurities in the gas intocomparativel large particles, which are then charged by e succeedinunidirectional surge and driven to the col ecting electrodes. Thisalternate coagulation and charging is repeated many times during thepassage of the gas adjacent to the electrodes so that all orcomparatively all of the fine (particles will be coagulated andprecipitate with the ex comparatively small amount 0 energy to thatwhich would be necessary to charge and precipitate, each small particleas originally found in the gas.

nditure of a While I have shown and described a specific embodiment ofmy invention, it is apparent that changes and modifications could bemade therein without departing from the s irit and scope of myinvention. I desire, t erefore,

that only such limitations shall be imposed as are indlcated in theappended claims or as ma be necessitated by the prior art.

claim as my invention:

1. A precipitator comprising a recipitator chamber, a set of collectinganh a set of ionizing electrodes therein and means for applyingalternately unidirectional and damped alternating current to the set ofionizing electrodes.

2. A treater for cleanin gas comprising a treating chamber, means orpassing the gas to be treated through the chamber, a collecting,electrode in said chamber for collecting the foreign matter in the gas,a charging electrode separated from the collecting electrode, atransformer for supplying a high voltage current, a transformer forsupplyin a high frequency alternating volta e and means for alternatelyCOIIIIGCtlDf sai transformers to the charging electro e.

. 3. A gas purifier comprisin through which thegas to be purified ispassed a plurality of electrodes in the chamber, a source of pulsatinghi h tension current, a source of damped high requency current and meansfor alternately connecting said sources to an electrode in said chamber.

4. A treater comprising a treating chamber, a ohargin electrode, meansfor produc-v ing a dampe high frequency current for coagulating theparticles to be precipitated, means for producing a high tension currentfor ionizing the partlcles and means for alternately connecting saidcurrents to the charging electrode.

5. A treater for cleaning gaseous fluids comprising a treating chamber,a plurality of electrodes therein, a transformer for supplying hightension currents, a transformer for supplying high frequency dam dcurrents and a synchronous commutator or alternate- 1y connecting saidtransformers to one of said electrodes.

La testimony whereof, I have hereunto subscribed my name this 12th dayof January 1931.

. RICHARD HEINRICH.

a chamber

